Adding-machine.



No. 876,196. PATENTED JAN. 7, 1908.

- A. J.-K,LUMB & A. W. KBAHN.

ADDING l\/IA("1HIIH3x APPLICATION FILED JULY 29. 1995.

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WITNESSES;

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ATI'ORNEYJ 1%., 876,196. PATENTED JAN. 7, 1908 A. LKLUMB & A. w. KRAHN.

ADDING MACHINE. APPLICATION FILED JULY 29. 1905.

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4% g H 6%. gilt/ 'M WA! 7/ F UNITED AnminGMAomn Specification of Lettersiatgnt. Application filed ini aa sct. s a No. 2711731.

. Patented. Jan. 7, 1908.

I0 all whom it may concern: 1

'Be it known that ALFRED'J. Kmnun and ALVIN WV.-KRAHN, citizens of the United States, residing at Milwaukee, county of Milwaukee, andState of Wisconsin, have invented new and useful Improvements in Adding-Maohines, of which the following is a specification. Our invention relates to improvements in adding machines.

The object of our invention is to provide a compact sim iilestruot'ure of few parts and correspondingly light weight winch can readily be carried from place to place, whereby the machine is adapted. for use by lumber sealers and 0*hers, whose duties require that the coinputii'ig process be Ptl'fOl'llH-Xl at different oints. I I In t e following description reference is had to the accompanying drawings, in which Figure 1 is a vertical sectional View of our.

I invention drawn between two of the registering Wheels. Fig. 2 is a plan. vie of a portion of the machine with a portion of the casing removed. Fig. 3 is a detail view in rear elevation of some. of the transferring niechan-' isms in their relation to the registering I wheels. Fig. 4 is a general plan view of my invention. Fig. 5 is a general side view with the casing partially broken away, illustrating the releasing lover of the resetting mochair ism. Fig. 6 is an enlarged view drawn to the same. plane as Fig. 1, but showing the transferring mechanism as it appears preparatory. to a transferring stroke, while in ig. 1, it is shown atthe end of such stroke. In. Fig. 6 one of the ratchet teeth l5 is prefen ably broken away to show the engagement of the teeth E with the ratchet member E.

Like parts are identified by the same reference characters throughout the several views. The registering wheels A to A inclusive are each provided withdigits ranging from zero to nine inclusive, and each of these regis tering wheels is mounted. to rotate independently in onedir'ection on a shaft B.- The shafi, B is provided with notches b in which a dog I) carried by each registering wheel is adapted to drop once during each revolution, so t rat 1') turning the shaft, all the register ing whee s may be brought into a uniform. relation to. each other, and the wheels reset at zero; Each of the Wheels may be indcpendently operated from a key C by means of an elbowed lever-C pivoted to the frame at C: and having a segmental rack D pivoted at d to the inner end of tlie lever C. a The rack D is provided with adownvvardly projecting arm-d, which is connectedwltha frame bar D by a spring D; .Thereactionary pull of this spring lifts the rack bar D upwardly and brings its teeth E into yielding engagement withthe teeth E ofthe ratchet hub carried by the corresponding registering wheel.

It will he observed that the rack D'pro- 3 forwardly'sfrom the pivot pin d into close proximity With the front end of the elbowed lever C. The bar curves in an are described from the pivot 'C of the elbow'lever 0 and a key hoard F covering the rack bars is provided with slots the levers C project. vided with a row of digits-for each. lever through which ranging from one to nine inclusive and cofrespondin in relative position with'the teeth E of a racli bar 1) andwiththe, digits on the:

respective registering Wheel'. 'Thelever C is normally inzcro position. It carries an indexf which is'brought into registry with a digit on the key. board (representing "the number to be added) byswinging the lever Cl onits pivot C". The motion of the lever in such casesjs communicated to movethe rack bar D backwardly. When the lever 1s released, the reaction of aspnng G retracts The icy board is prothe lever and the teeth of the rack bar engage and actuate the ratchet and corresponding registering Wh-eel.-'-* Each of the registering wheels is provided =with' a hubhaving three ratchet members. 1 The ratchet teeth E are engaged by the teeth E of'rack bar 1). Ratchet teeth H on the hub are adapted to be engaged by aistop Il designed to prevent oiger-rotation and operated as hereinafter explained. Ratchet teeth hare adapted to be engaged by a stop dog [1 car-' ried iv an elbow lever l and actuated by a spring I, conneeted with across bar 'i, which also operates as a spacer forthe rack bars D. T he teeth 71' are also engaged and actuatedby a transferring niechanisln'as hereinafter explained. All the teeth are rigidly connected with the huh-of the corresponding registering wheel, thcniovement of which is thereby controlled.

Thestop H is (3111((l by one arm of'the elbow lever I. This arin ofthe elbow lever is provided with a projectin tooth I which is struck by a'bar J pivoted to the lever C at J, and arranged, and held by a spring jin a position, to strike the tooth I"during the final return stroke of the lever C,"whereby the dog II is momentarily pushed into a position to engage one of the teeth H and cheek the momentum of the registering wheel and I to the position in which It is shown in full in said figure.

When the lever C is again actuated, the bar J swings upon its pivot until it clears the tooth I and then moves rearwardly with the lever and reassumes its normal relationthereto, so that it Wlll again strike the tooth I on its return stroke.

The spring I normally holds the do H out of engagement with the ratchet teet Any suitable transferring mechanism may A be employed. In the construction shown,

frame of the machine.

.ceeding registering wheel.

'each of the registering Wheels is provided with a cam disk L. A lever ivoted on a suitable shaft L has one arm projecting into engagement with the cam L, whereby,

as the. cam is rotated with the registering wheel, the arm L is pushed backwardly b the cam, and then released suddenly as it clearsthe shoulder K of the cam, whereupon the lever reacts under the pull of the spring M connecting the arm M of the lever with the Another arm N of thelever carries 'a pawl N pivotally connectedwith the'arm N at n and adapted to engage the teeth h on the hub of the next sucthe pawl N moves slidingly on a uide bar 0 and a spring P presses downwardly on this end of the pawl, whereby the other end is held in contact with the ratchet teeth h.

It will be observed that the spring P connects the rear end of the pawl N with an arm Q of a swinging stop bar R, the latter having a hook shaped member R adapted to be swung into the path of the teeth H on they corresponding hub of a registering wheel.

During the reactionary movement of the cam actuated lever under the reaction of the spring M, a shoulder W on the pawl N mo mentarily engages the member R and swings it into position to catch one of the teeth H and stop the rotation of the ratchethub, thus limiting the movement of the registering wheel under the impulse imparted by the pawl N. The spring P presses upon the arm Q with suflicient tension to restore the sto me'mber R to normal position when a mem er S, connected with the bar R, is brought in contact with the guide bar 0.

In operation, the ri ht hand colurnnof digits on the key boar: F represents units; (see Fig. 4), the next columns, tens; the next, hundreds, etc'. Assuming that the number 654 is to be added, the lever O corresponding with the hundreds column will be moved until its. index registers with the digit 6 on the key board. The lever correspending with the tens column will bemoved up until its index registers with the digit 5 on wheel movement.

The rear end of.

the key board. The right hand lever is moved up until its index registers with the number 4 on the key board. Each of the levers returns to normal position assoon as released under the reactionary pull exerted by the springs G and D". The levers may beactuated 1n any desired order.

The shaft B, on which the registering wheels are mounted, is provided with an end disk T having a notch therein adapted for the reception of a catch t on aspring actuated le'ver T at one side of the machine. When it is desired to reset the registering wheels, this lever T is depressed and the shaft-turned by means of a knob U thereon, whereupon the dogs I) of the several registering wheels drop into the notches b in the shaft and lock the registering wheels to the shaft, so long as the shaft is turned in the direction of registering This movement is continued until the zero marks on all the registering wheels are brought to the sight apertures V in the casing, whereupon the catch t reengages in the notch of the disk T and locks the shaft against further movement.

The dogs I) and notches l) are formed to release the registering wheels when the latter are independently advanced by the actuati s ism.

Having thus described our invention what we claim as new and desire to secure by- Letters'Patent is,

1. In a machine of the described class, the combination with a registerin lever C or by the transferring mechanmental rack bar in operative relation to the ratchet hub, and an actuating lever for operwheel, a. .ratchet hub connected therewith, a segating the rack bar; of a pivotal stop adapted to engage teeth on the ratchet hub, but normally held out of engagement therewith; and

a swinging device carried b said actuating lever, adapted to engage sai stop during the .retractive movement of the lever, whereby said sto is pushed into position for engagement with teeth on the ratchet hub; s'aid swinging device'being arranged to release completion of such lever said stop at the movement. I

2. In a machine of the described class, th

vided with a ratchet hu an actuatin lever provided with a segmental rack bar ad to communicate motion to the registering wheel throu h the ratchet hub; an oscillatory sto normalIy out of position forengagement wit teeth on said ratchet hub, but arranged to be moved into the path of such teeth; a stop actuating member pivotallyrnounted on the actuating lever; a s ring, controlling the normal position of sai stop actuating member;

and a projection on said stop adapted tobe engaged by the stop actuating member when the leveris swun said member being ada ted to engage an pass said projection with combination with a registering wheel proapted yielding pressure thereon during the movement of the lever, whereby said stop is mementarily pushed into position for engage ment with teeth on the ratchet hub. 3. In a machine of the described class, the combination with a registering wheel proprqvided with a segmental rack bar apted to,communicate motion to the registering h the ratchet hub; an oscillatory" wheel'throu sto nornialIy out of position for engagement wit 1 teeth on said ratchet hub, but arranged to be moved into the path of such teeth; a stop actuating member pivotally mounted on the actuating lever; a s' ring controlling the normal member; ang a projection on said stop adapted to be engaged oy the stop actuatingmember when the lever is swun said member ass said prothe movement of the lever, whereby said stop ismomentarily pushed into position for engagement. with teeth on the ratchet hub; together with another stop normally in cohtact with the teeth of the ratchet hub and adapted to prevent backward rotation. x

'4. n a machine of the described class, the combination of a lever having an intermediate pivotal fulcrum, and two upwardly divergent arms; a rack bar pivotally connected with one of said arms, and extending'inthe irection of the other arm; a ratchet member in operative relation to the rack bar; and a registering wheel operatively connected with the position of sair stop actuating ratchet member; together with means for ap plying yielding pressure to the rack bar in the direction of the ratchet member.

5. In a machine of the described class, a key board provided with a series of slots,

i and havin digits thereon arranged in rows vided with a ratchet hub; an actuating lever substantially parallel to the slots; 0 erating IGXLGIS, one extending through each s ot, and

provided with an index for registry with the digits; registerin wheels operatively connected with 'the levers; and springs retracting the levers; said levers being normally at the outerends of the slots: and each set of digits being arranged on the key board in numerical order and increasin in value inwardlv from the levers in normaIposition.

6. In a machine. of the described class, the combination with a set of registering wheels; of a trip actuated transferring mechanism; and a swinging stop normally in ino erative position, and adapted to be engagec. by the transferring mechanism and swung momentarily to operative position during the transferring stroke; saic transferring mechanisnr being ada ted to release the stop on the completion 0' its stroke and said stop being arranged to return automatically to normal position.

i In testimony whereof I a'fiix my signature in the presence of two witnesses.

ALFRED J. KLUMB.

ALVIN W. Kllxll-IN.

Witnesses:

Lnvnmrrr C. WHEELER, JAS. B. ERWIN. 

